The Pro 40.5mm 99-UVBTS Brass UV Filter is Chiaro’s top-performing protective UV filter offering 99% light transmission. It’s ideal for photographers who demand the highest-quality glass and other essential features for uncompromised image fidelity and premium construction.

To achieve superior 99% light transmission, Chiaro uses highly-polished Schott glass, multi-coating, and additional advanced elements that improve the filter’s light transmission. A scratch-resistant coating minimizes scratching of the glass and helps assure that water, oil, dust, and fingerprints are removed with a gentle wipe. The durable brass filter ring is designed to screw on and off effortlessly, and it’s thin to prevent vignetting when used with wide-angle lenses. Side knurling is crafted to help ensure that you’ll have a firm grip when attaching or removing your filter.

Image quality is what matters most at Chiaro. The company has tested and combined many features and essentials to achieve superior image quality and the highest light transmission. To help take the confusion out of selecting a filter, Chiaro prominently displays the light transmission levels so that you can choose the perfect filter for your lens and photo session.

99% Light Transmission    Clear UV Protective Filter    Polished Schott Glass    Scratch Resistant    Water, Oil, Dust, Fingerprint-Resistant    Slim Brass Filter Ring    Top & Side Knurling

Protecting your lens doesn't mean you have to lose optical quality. By using highly-polished Schott glass and advanced coatings, Chiaro can offer a 99% transmission rate, which is the highest possible transmission rate for glass. And the company verifies the ratings with ISO certified lab testing.

The layers of advanced resistance coating on the filter are designed to resist moderate scratches, and allows you to easily clean your filter. Water beads up and rolls off your filter, and oil and fingerprints can come off with a gentle wipe. Dust and debris won't adhere to the filter and can be removed with a puff of air.

Glass that's polished to perfection is essential to achieve a high level of light transmission. The Schott glass in this Chiaro filter is highly-polished for flatness that ensures superior optical clarity.

Multi-coating enhances light transmission to the demanding level set for all Chiaro filters. It reduces unwanted internal reflections and ghosting that can compromise your images.

The filter blocks UV light and reduces the bluish cast of daylight that can affect color accuracy, especially at higher altitudes.

The durable brass filter ring offers a substantial, premium feel. The unique properties of brass minimize the chance of jamming or binding when you're screwing the filter onto your lens or stacking filters.

Measuring only 3.2mm, this filter is slim enough to use on wide-angle lenses without experiencing vignetting.

In addition to top knurling, Chiaro added side knurling that helps offer better options to grip the filter when you're attaching and removing it, or when you're stacking filters.

It takes two full turns to mount the filter on your lens. This feature will securely hold your Chiaro filter through the most demanding photo shoots.

The front threads on the filter allow you to stack filters by screwing them onto your Chiaro filter.

Related Questions and Answers

Q: 1. Under the heading of "use and handling" it says that there are threads for filters, is it just this filter that will not fit ?

A: This filter will fit a 48mm filter thread and it also has front 48mm threads that will accept a 48mm filter.

Q: 2. is this filter made in China just as good as those made in Germany?

A: Where a filter is made is not as important as who makes it. The Chiaro Pro 77mm 99-UVBTS Brass UV Filter is certainly as good as filters made in Germany.

Q: 3. will this fit on Canon RF 200-800mm f/6.3-9 IS USM Lens (Canon RF)?

A: Yes, the Chiaro Pro 95mm 99-UVBTS Brass UV Filter will fit on the Canon RF 200-800mm f/6.3-9 IS USM Lens (Canon RF). The lens front thread diameter is 95mm.

Q: 4. Will the lens hood for the Lumix 100-400 Telephoto fit using this filter?

A: Yes, it will fit.

Q: 5. What size do i need for my a7iii 28-70 kit lens

A: The Sony 28-70mm lens uses a 55mm filter such as this: https://bhpho.to/3VuXQsk

Q: 6. Does this filter fit onto a lens Rodenstock HR Digaron-W 32mm?

A: Yes, the Chiaro Pro 86mm 99-UVBTS Brass UV Filter, BH # CHT99UVBTS86 is compatible with the Rodenstock HR Digaron-W 32mm.

Q: 7. Does the 67mm filter have front threads for a lens hood? The images seem to indicate no.

A: The Chiaro Pro 67mm 99-UVBTS Brass UV Filter does offer front 67mm threads.

Q: 8. Where or what country made this filter? I know B+W is made in Germany and it clearly states it on the product.

A: Made in China. Good thing B&H told me because I tried to contact the company to ask them and received no response. Going back to B+W or Hoya.

Q: 9. Will this filter cause vignetting when used on Nikkor 14-24 mm/ 2.8 Z lens

A: I am not certain, but yes, it is possible vignetting may occur when using the Chiaro Pro 112mm 99-UVBT UV Filter on your lens. According to the Nikon NIKKOR Z 14-24mm f/2.8 S Lens instruction manual, Nikon states that shadows may appear at the periphery of pictures taken with third-party screw-on filters. As such, while we cannot test every filter on every lens, there is a possibility that vignetting may occur.

Q: 10. Can a step-up ring be added to the front?

A: Yes, this filter has a front thread of 58mm.